Atara Biotherapeutics, Inc. reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
Thousand Oaks, CA
SEC filing record 1 source field available
Fiscal year end
31 December
Atara Biotherapeutics, Inc. has filed 1,129 SEC EDGAR filings since 10 Apr 2014

SEC filing history

Showing 26-50 of 1,000 matching filings.

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25
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2
SCHEDULE 13D/A File 005-88393

SCHEDULE 13D/A filing

Filing date
11 May 2026
Reporting date
Not listed
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4

4

Filing date
11 May 2026
Reporting date
07 May 2026
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4

4 filing

Filing date
11 May 2026
Reporting date
07 May 2026
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3

3 filing

Filing date
11 May 2026
Reporting date
07 May 2026
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SCHEDULE 13G File 005-88393

SCHEDULE 13G filing

Filing date
08 May 2026
Reporting date
Not listed
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144 File 001-36548

144 filing

Filing date
07 May 2026
Reporting date
Not listed
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SCHEDULE 13G/A File 005-88393

SCHEDULE 13G/A filing

Filing date
07 May 2026
Reporting date
Not listed
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DEF 14A File 001-36548

DEF 14A

Filing date
24 Apr 2026
Reporting date
24 Apr 2026
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DEFA14A File 001-36548

DEFA14A

Filing date
24 Apr 2026
Reporting date
Not listed
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EFFECT File 333-294377

EFFECT filing

Filing date
25 Mar 2026
Reporting date
Not listed
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424B3 File 333-294377

424B3

Filing date
25 Mar 2026
Reporting date
Not listed
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CORRESP

CORRESP filing

Filing date
23 Mar 2026
Reporting date
Not listed
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UPLOAD File 333-294377

UPLOAD filing

Filing date
20 Mar 2026
Reporting date
Not listed
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4

4

Filing date
19 Mar 2026
Reporting date
17 Mar 2026
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424B5 File 333-275256

424B5

Filing date
16 Mar 2026
Reporting date
Not listed
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4

4 filing

Filing date
11 Mar 2026
Reporting date
09 Mar 2026
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4

4 filing

Filing date
11 Mar 2026
Reporting date
09 Mar 2026
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4

4 filing

Filing date
04 Mar 2026
Reporting date
02 Mar 2026
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4

4 filing

Filing date
04 Mar 2026
Reporting date
02 Mar 2026
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